Transformer construction



R. v. BINGAY. TRANSFORMER CONSTRUCTION, APPLICATION FILED OCI: I7. 1919.

1,425,504, Patented Aug. 15', 1922.

ROBERT V. BINGAY, OF PITTSBURGH, PENNSYLVANIA, ASSIGNOR TO PITTSBURGHTRANSFORMER COMPANY, A CORPORATION OF PENNSYLVANIA.

TRANSFORMER CONSTRUCTION.

Specification of Letters Patent.

Patented Aug. 15, 1922.

Application filed October 17, 1919. Serial No. 331,324.

T all whom it may concern:

Be it known that I, ROBERT V. BINGAY, a citizen of the United States,residing at Pittsburgh, in the county of Allegheny and State ofPennsylvania, have invented certain new and useful Improvements inTransformer Constructions, of which the following is a specification.

This invention relates to electrical transformers and particularly tothe mechanical construction of the supporting parts of a transformercasing. The object of the invention is to provide a transformerstructure which will be strong and' at the same time inexpensive in itscost of production.

In prior structures the transformer casing. has had a top and supportingbase of metal-constructed or cast to fit and sustain the parts. Suchmetal construction when of sufficient size and strength is cumbersomeand costly, requiring a very heavy top to have sufiicient strength toprevent buckling when lifted, and a very large base.

In the transformer of this invention the objections tothesepriorstructures is overcome and the transformer casing is providedwitlra top and base of strong and durable construction at a greatreduction in cost.

In the accompanying drawings Fig. l is a view in elevation with partsbroken away and in sectionof a transformer illustrating one embodimentof this invention, and

Fig. 2 is a view in vertical section of a detail of Fig. 1.

In the embodiment of the invention shown in the drawings a tank 3containing the transformer core and coils immersed in oil is supportedon a base 4 and has a top or cover Vertical tie rods 16 connect thecover to the coil supporting frames and vertical tie rods 7 fasten thecover and with it the tank to the base 4. The transformer in assembledcondition is lifted by means of these outer tie rods 7.

The base 4 is of reinforced concrete construction comprising edgeI-beams 10 or other suitable metal edge within which is formed theconcrete slab 11 having longitudinal reinforcing members 12 andtransverse reinforcing members 13. The top surface of the base isprovided with transverse channel bars 14 having their upper flatsurfaces raised QbO G the surface of the concrete and adapted to supportthe tank 3 away from the base so that the bottom of the tank will. notbe corroded by moisture. Anchorages for the rods 7 are provided by metalstrips imbedded in the under surface of the concrete and bent as at 21to form pockets for the lower ends of rods 7 and their nuts 17.

The top 5 of the transformer tank is composed of reinforced concretehaving a top plate 6, opening 25 and cover 26. In the formation of this,top the plate 6 may-be turned upside down and the manhole aperture 25and other apertures provided with filling blocks or frames to excludethe concrete, which is then poured upon the plate covering thereinforcing rods 28 and leveled off to any desired thicknesses. Vhenset, this concrete filler forms a slab of great strength resistingcompression and supporting the top against flexure when the transformeris lifted.

The reinforced concrete construction of this invention adds to thestrength of the transformer parts and at the same time greatly reducesthe cost of production.

Hitherto special patterns were required forthe bases of each size andtype of transformer; the concrete bases of this invention can be readilybuilt up for each different transformer at a small fraction of the costof the prior castings or steel structures.

I claim:

1. The combination with a sheet metal tank having a cover, of asupporting base for said tank comprising a metal frame set with a slabof reinforced concrete, and clamping rods extending between said baseand cover to clamp said tank on said base.

2. The combination with a sheet metal tank having a cover, of asupporting base for said tank comprising a metal frame of channel barswith inward directed flanges within in which is set a slab of reinforcedconcrete, and clamping rods extending between said base and cover toclamp said tank on said base.

3. The combination with a transformer tank having a bottom, ofasupporting base therefor comprising a reinforced concrete slab havingmetal surface ribs for supporting said tank bottom at separated points,lifting rods attached to said base, and strips in said concrete servingas anchorages for said rods.

4. The combination with a transformer tank having a bottom, of asupporting base therefor comprising a reinforced concrete 10' slab,metal strips on the surface of said slab forming ribs for supportingsaid tank, and lifting rods attached to said base.

ROBERT V. BIN (:AY.

